The Law of the Conservation of Mass states that "Mass is conserved in a closed system". For chemical equations - that means that the number of each type of atom in the reactants is equal to the number of the same type of atoms in the product.
atoms in reactants = atoms in products
Mass is not created or destroyed in a chemical reaction - the way the atoms are bonded to each other changes.
Here is some help and practice in balancing chemical equations:
atoms in reactants = atoms in products
Mass is not created or destroyed in a chemical reaction - the way the atoms are bonded to each other changes.
Here is some help and practice in balancing chemical equations:
http://funbasedlearning.com/chemistry/chemBalancer/default.htm
http://funbasedlearning.com/chemistry/chemBalancer2/default.htm
http://funbasedlearning.com/chemistry/chemBalancer3/default.htm
(you will need to download mimio software to use this - go to mimio.com to download)
If you cannot download mimio software, then open this file:
use these links for the interactive tutorials:
http://www.mpcfaculty.net/mark_bishop/balancing_equations_tutorial.htm
http://education.jlab.org/elementbalancing/index.html